* {
    padding: 0;
    margin: 0;
  }
  
  html,body {
    height: 100%;
  }
  
  body {
    background-color: rgb(81, 43, 80);
    display: flex;
    justify-content: center;
    align-items: center;
  }
  
  .main-container {
    width: 300px;
  }
  
  .main-container .header {
    font-size: 25px;
    color: rgb(240, 208, 167);
    text-align: center;
    line-height: 80px;
  }
  
  .main-container .list-container {
  
  }
  
  .main-container .list-container > ul {
    list-style: none;
  }
  
  .main-container .list-container > ul >li {
    height: 50px;
    background-color: rgb(182, 104, 118);
    font-size: 16px;
    font-weight: 200;
    line-height: 50px;
    color: aliceblue;
    position: relative;
    border-bottom: 1px solid rgb(81, 43, 80);
    z-index: 1;
  }
  
  .main-container .list-container > ul >li>label>span {
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    height: 50px;
    width: calc(100% - 70px);
    padding: 0 20px 0 50px;
    user-select: none;
    transition: .5s;
  }
  
  input[type='checkbox'] {
    width: 0;
  }
  
  input[type='checkbox']::before {
    width: 10px;
    height: 10px;
    content: '';
    display: block;
    background-color: aliceblue;
    border: 5px solid aliceblue;
    border-radius: 20px;
    position: absolute;
    top: calc(50% - 10px);
    left: 10px;
    z-index: 3;
    transition: .5s;
  }
  input[type='checkbox']:checked::before {
    background-color: rgb(81, 43, 80);
  }
  
  input[type='checkbox']:checked+span {
    background-color: rgb(102, 55, 100);
    text-decoration: line-through;
  }